System Environment: -------------------------- Arch: i386 Platform: Pineview Libdrm: (master)2.4.31-1-g2cfac57d364d0166ed9472b086c16aea376f495a Mesa: (8.0)e86d90eb208292916c8a04c5d75499492003dd16 Xserver: (server-1.11-branch)xorg-server-1.11.3 Xf86_video_intel: (master)2.17.0-644-g4d8369f8e60fd4f5a0ef49f3e9866ea5ecb21927 Kernel: (drm-intel-fixes) 617cf884810b44384fe8e9431e9babeb80a2ff37 Bug detailed description: ------------------------- It fails at mesa master and mesa 8.0 branch on pineview. Below cases also fail: linestip(basic.allCases) tristip(basic.fan) tristip(basic.strip) tristip(basic.triangles) polystip(basic.allCases) Bisect shows 85a52bf7b5f5f0317d15a51f94f294fc5e72d936 is the first bad commit. commit 85a52bf7b5f5f0317d15a51f94f294fc5e72d936 Author: Ian Romanick <ian.d.romanick@intel.com> AuthorDate: Thu Jan 19 17:29:37 2012 -0800 Commit: Ian Romanick <ian.d.romanick@intel.com> CommitDate: Fri Jan 27 18:02:42 2012 -0800 swrast: Use fixed-function processing instead _TexEnvProgram for DrawPixels This is a hack to work around drivers such as i965 that: - Set _MaintainTexEnvProgram to generate GLSL IR for fixed-function fragment processing. - Don't call _mesa_ir_link_shader to generate Mesa IR from the GLSL IR. - May use swrast to handle glDrawPixels. Since _mesa_ir_link_shader is never called, there is no Mesa IR to execute. Instead do regular fixed-function processing. Even on platforms that don't need this, the software fixed-function code is much faster than the software shader code. NOTE: This is a candidate for the 8.0 branch. Reproduce steps: ---------------- 1. start X 2. ./oglconform -z -s -suite all -v 2 -test mustpass basic.stipple
*** Bug 45878 has been marked as a duplicate of this bug. ***
The following Piglit failures also bisect to this commit: general/linestipple glean/paths spec/OpenGL_1.2_texwrap-3D-bordercolor spec/OpenGL_1.2_texwrap-3D-proj-bordercolor texturing/texrect-many
Created attachment 56892 [details] [review] Proposed work-around
*** Bug 45876 has been marked as a duplicate of this bug. ***
Fixed on 8.0 branch by: commit ff1d9450321d5fe164611f819ee299706d9cbe02 Author: Ian Romanick <ian.d.romanick@intel.com> Date: Fri Feb 10 16:00:27 2012 -0800 swrast: Only avoid empty _TexEnvPrograms If the generated shader for _TexEnvProgram is empty, force the use of the fixed-function code. Otherwise, go ahead and use the shader. This works around a mysterious issue on i915 where fixed-function software fallbacks are not working correctly. This isn't really the fix we want, but it works around the issue. Signed-off-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Chad Versace <chad.versace@linux.intel.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45872 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45876 (cherry picked from commit 3e22d4e5fc32dafcb9669a9d6376323aa88e300c)
Verified with mesa master branch(ead3589aa) and mesa 8.0 branch(437ed1faaf6).
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